File should be placed in: `~/Library/Application Support/Sublime Text 3/Packages/User/`

PHP.sublime-build

/**
 * Create a custom [build system](http://bit.ly/17IKkU9) to provide PHP syntax checking.
 * Save this file as ~/.config/sublime-text-2/Packages/User/PHP.sublime-build
 *
 * Usage
 * - In the editor, select a tab with PHP source code.
 * - Press F7 or CTRL + B to run PHP syntax check.
 * - The status will be be displayed in the console at the bottom.
 * - If it shows error, press F4, and the editor cursor will be brought to the relevant line in the source code.
 */
{
  "cmd": ["/Applications/MAMP/bin/php/php7.0.8/bin/php", "-d display_errors=1 -l", "$file"],
  "file_regex": "^PHP Parse error: .+ in (\\S+) on line (\\d+)",
  "line_regex": "^PHP Parse error: .+ in \\S+ on line (\\d+)",
  "selector": "source.php"
}